Re: NullPointerException

Thu, 16 Dec 2004 06:24:39 -0800

I am going way out on a limb here, but I might have something to do with retrieving your message resources. Make sure you have your ApplicationResources.properties file located in your WEB-INF/classes.

uma.k wrote:

I get NullPointerException when I access this index.jsp page. I also have
ApplicationResources.properties file in web-inf/classes folder

<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<html>
<head>
<title><bean:message key="title.employeeApp"/></title>
</head>
<body>
<h1><bean:message key="title.employeeApp"/></h1>
<br>
<html:link page="/articleForm.do">Add An Article</html:link>
</body>
</html>

This is my struts-config.xml file

<?xml version="1.0" encoding="ISO-8859-1" ?>

<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
          "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd";>


<struts-config>

<form-beans>
    <form-bean name="articleForm" type="articles.ArticleForm"/>
</form-beans>

<action-mappings>

        <action path="/articleForm"
                        forward="/articles/Template.jsp" />

    <action
        path="/InsertArticle"
        type="articles.ArticleAction"
        name="articleForm"
        scope="request"
        validate="false"
        input="/Template.jsp">
        <forward name="success" path="/articles/preview.jsp"/>
        <forward name="failure" path="/articles/Template.jsp"/>
        </action>

</action-mappings>

        <message-resources
                parameter="ApplicationResources"
                null="false" />


</struts-config>


This is my complete exception

java.lang.NullPointerException
        at
org.apache.struts.taglib.TagUtils.retrieveMessageResources(TagUtils.java:121
9)
        at org.apache.struts.taglib.TagUtils.message(TagUtils.java:1082)
        at 
org.apache.struts.taglib.bean.MessageTag.doStartTag(MessageTag.java:226)
        at org.apache.jsp.index$jsp._jspService(index$jsp.java:68)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        at
org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.ja
va:201)
        at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247)
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:193)
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:243)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:190)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:2
46)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:170)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170
)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174)
        at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66)
        at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:
1027)
        at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125
)
        at java.lang.Thread.run(Thread.java:595)


What could be wrong? 


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